@boost/decorators/mjs/Debounce.mjs

Experimental decorators for common patterns.

import { isMethod } from './helpers/isMethod.mjs';

/**
 * A method decorator that delays the execution of the class method
 * by the provided time in milliseconds.
 */
function Debounce(delay) {
  return (target, property, descriptor) => {
    if (process.env.NODE_ENV !== "production" && (!isMethod(target, property, descriptor) || !('value' in descriptor && typeof descriptor.value === 'function'))) {
      throw new TypeError(`\`@Debounce\` may only be applied to class methods.`);
    }

    // We must use a map as all class instances would share the
    // same timer value otherwise.
    const timers = new WeakMap();

    // Overwrite the value function with a new debounced function
    const func = descriptor.value;

    // @ts-expect-error Override generic
    descriptor.value = function debounce(...args) {
      const timer = timers.get(this);
      if (timer) {
        clearTimeout(timer);
        timers.delete(this);
      }
      timers.set(this, setTimeout(() => {
        func.apply(this, args);
      }, delay));
    };
  };
}
export { Debounce };
//# sourceMappingURL=Debounce.mjs.map